Electric cord attachment plug



March 17, 1936.I i 1 CLAYTON l 2,033,973

ELECTRIC CORD ATTACHMENT PLUG Filed Jan. 23, 1953 le wis J Clayton.

Patenterl Mar; 17, 1936 2,033,973 ELECTRIC CORD ATTACNT PLUG Lewis J.Clayton, Toront signor to Vicero Limited, Toronto,

Application January 23,

3 Claims.

ects of this invention are, to ector for flexible cords which emelyrough usage and will cord from disconnection from 'I'he principal objprovide a. plug conn will withstand extr effectively hold the 6 theterminals.

A further and im a. plug of very sim tion which may be defective ordamag 10 quickly replaced.

The principal features of the invention consist in the novelconstruction of Aa flexible socket member and a semi-flexible terminalmember and metal terminals whereby the terl5 minal-holding member andthe metal terminal mounted therein aresecurely held within recessesformed in the socket member but are capable of being readily removabletherefrom.

In the accompanying drawing, Figure 1 is a go perspective view of myimproved plug.

Figure 2 is a longitudinal mid-sectional view of the plug taken throughthe metal terminals and showing the manner of securing the electriccord.

as Figure 3 is a longitudinal sectional view taken on the line 3 3 ofFigure 2.

Figure 4 is a perspective view of the semiexible terminal holder showingthe terminals and wires in their assembled positions.

Figure 5 is a longitudinal sectional view of the flexible socket membertaken on the same plane as the section, Figure 2.

Figure 6 is a longitudinal sectional view of the flexible socket membertaken on the same plane 85 as the section, Figure 3.

Figure 7 is a sectional plan view of the flexible socket member taken onthe line 'I-'I of Figure 6.

Numerous forms of flexible attachment plugs have been devised in whichthe metal terminals G are moulded into or otherwise rigidly secured inthe body of the material or to a member removably secured in theflexible body.

In the invention.\herein shown the terminal holder `I preferably mouldedof semi-hard rubber,

is formed with a circular portion 2 provided with a projecting annularflange 3 and extending from the back thereof is a centrally arranged lug8 extending across one diameter thereof. This lug is formed withinwardly tapering sides and lo inwardly tapering edges 6 leading to aflat-sided portion I which is provided with a hole 8 extendingtherethrough.

A pair of narrow one at either side o l extend through th portant objectis to devise ple and inexpensive construceasily assembled and in whiched terminals may be easily and parallel slots 9 are arranged f the baseof the lug 4 and e circular portion 2.

y Manufacturi Ontario. Caa

o, Ontario, Canada, as-

g Company 1933, Serial No. 652.999

(ci. 11a- 361) slots are spaced apart the desire the spacing of theterminals.

The terminals I0 are each formed of a metal strip of the samedimensionsas the slots 9 and one end II of each is bent at right angles and theshort end is provided with a. threaded hole in which a binding screw I 2is threaded.

The body I3 of the plug is moulded in one piece preferably of a flexiblerubber material and is provided witha tubular shank I 4 and a. flaringbell end I5 which may have any desirable external pattern. f

The inner Wall of the bell end I5 is formed with an annular groove I6 ofapproximately the same diameter and depth as the flange 3 of the memberI and the inner diameter I'I of the chamfered rim is adapted to iitsnugly around the perimeter of the circular part 2 of the member I..

A pair of recesses I8 are moulded in the inner wall of the bell end ofthe body I3 in diametrically opposed relation and these extend inwardlyfrom the groove .I6 toward the tubular shank. 'I'he inner wall of thebell end I5 tapers inwardly from the groove I E so that when the memberI is Inserted therein the tapering surfaces 6 of the member I fit snuglythereagainst as shown` in Figure 3 and the perforated end 8 fits snuglyinto the bore of the tubular shank.

The laterally and outwardly turned ends II of the terminals and thescrews. I2 extend into the recesses I8 and the tops of the; screwssnugly Aabut the top surfaces of the recesses.

In assembling this device, the terminals pushed through the slots 9, thewalls of snugly hold the terminals in a parallel position. The ends ofthe wires I9 are threaded through the hole 8 from opposite sides and theends are erminals by the binding screws. locked securely by beingcrossed through the perforated lug and as the lug is of a semi-hardmaterial, preferably -a rubber compound, the wires will not be fracturedby pulling against the lug nor will the insulation be injured. wires ofthe terminals have thus d distance for III are which d forms a subwireshould become disconnected itis merely necessary to strip the bell endof the body member from the terminal holder and pull out and replace thedamaged member or repair the connection and then replace the terminalholder.

The extreme simplicity of the device as well as its remarkable cheapnesswill, from thisV 'lescripltion, be readily apparent.

It will be noted that the electric wiresl passing through the hole 8will, upon being pulled,L stretch the material of the lugs so that the-hole is elongated and the side walls of the hole ac ts as a snubber tohold the wires securely.

I What I claim as my invention iszl. An electric attachmentplugincluding an outer resilient tubular member and an inner contactblade holding member of relatively rigid material removably arrangedwithin said outer tubular member, said blade holding member havingcontact blades removably threaded therethrough and said blades havingtheir inner ends turned laterally and directly overlapping the rearwardside of the holding member, binding screws in said laterally turnedends, disposed in the longitudinal direction of the plug the inner wallof the outer tubular member having bottomed notches formed thereinaccommodating the laterally turned ends of the terminals and the bindingscrews, and means retaining said blade-holding member resilientlyinterlocked with said outer tubular member with the heads of -saidbinding screws engaged in cushioning pressure contact with the bottomsof said notches.

2. An electric attachment plug of the interiitting two piece typecomposed of an outer tubular element and an inner blade holding inserthaving spaced contact blades mounted therein and lead wires connected tothe blades and extending rearwardly, in combination with a rearwardlyelongated resilient rubber lead-gripping member directly connected withand extending rearwardly from said inner blade holding insert in a planeintermediately between the plane of disposition of said spaced blades,the rearwardly extending 'lead wires being converged and loopedtransversely through and frictionally engaged by said rearward extensionfrom opposite sides to provide a cushioned strain relief anchoragetherefore.

3. An electric attachment plug including an outer resilient tubularmember and an inner contact blade holding member of relatively rigidmaterial removably and resiliently interlocked with said outer tubularmember, said blade holding member having contact blades mounted thereinand having a resilient rearwardly extending lug formed integraltherewith, said lug having a single opening therethrough at its innerend extending in a direction transversely of the longitudinal axis ofthe tubular outer member and of a size to snugly receive a pair of sideby side lead wires in frictional contact, and lead wires extendinglaterally through said single lug opening and crossing each other inside by side relation therein and extending forwardly within said outermember for connection withthe rearward ends oi said contact blades, saidlead wires being adapted on longitudinal stress to' tension saidresilient lug and said lug when tensioned being adapted to constrict thewalls of the said opening into frictional gripping engagement with theinserted leadv wires.

